/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */

package org.apache.jmeter.engine;

import java.util.LinkedList;

import org.apache.jmeter.engine.util.NoThreadClone;
import org.apache.jmeter.testelement.TestElement;
import org.apache.jorphan.collections.HashTree;
import org.apache.jorphan.collections.HashTreeTraverser;
import org.apache.jorphan.collections.ListedHashTree;

public class TreeCloner implements HashTreeTraverser {

	private ListedHashTree newTree;

	private LinkedList objects = new LinkedList();

	private boolean forThread = true;

	public TreeCloner() {
		this(true);
	}

	public TreeCloner(boolean forThread) {
		newTree = new ListedHashTree();
		this.forThread = forThread;
	}

	public void addNode(Object node, HashTree subTree) {
		if ((!forThread || !(node instanceof NoThreadClone)) && (node instanceof TestElement)) {
			node = ((TestElement) node).clone();
			newTree.add(objects, node);
		} else {
			newTree.add(objects, node);
		}
		objects.addLast(node);
	}

	public void subtractNode() {
		objects.removeLast();
	}

	public ListedHashTree getClonedTree() {
		return newTree;
	}

	public void processPath() {
	}

}